不完全骨折是
A．粉碎性骨折B．斜行骨折C．嵌插骨折D．青枝骨折E．横行骨折
参考答案：D
在数轴上距离原点2个单位长度的点所表示的数是（ ）
A．2
B．-2
C．2或-2
D．1或-1
It has always been the ______ of our company to encourage workers to take part in social activities.
A．plan
B．procedure
C．rule
D．policy
